A guildy of mine somehow made me think of this eventho i tried to trick him into a screenshot situation. He was wondering if each class would match a certain personality.. he offered his toons as an example and told me why he found that those toons matched him:
Now this straight away shows that a person can't be fit into one box and have a personality which matches multiple classes, but there are classes which won't fit a person at all. This guildy mentioned to me a Warrior wouldn't be his thing at all.
So what personality matches the other classes? I'm sure people have different views on the matches and it also depends on not just on the class' spec but on how it's played aswell. Let's do some rough assumptions here tho, might get the juices flowing.
Those who don't pull probably the fact that they can deliver damage from a long distance at relative safety.
But perhaps you like the bit of going out there with your pet, making you more of a Lone Ranger type.
A dps warrior might match a whole different personality, someone who likes to be in the heat of battle.. a wolf among a pack, not a crucial part but contribution none of the less.
A feral druid may either like the bear bit where he can be in controll of a fight or more the kitty side, as a result of a more rogue'ish character.
Moonkin may have a more caster like personality, prefering to stay at the end of the battle.. doing is part in a somewhat saver enviroment.
Depending on their later spec they get a more tank, healing or dps touch.. matching a controlling, supporting or agressive personality.
Now all the above could be dismissed as bullshit as a large quantity of Wow players never knew what their endrole would be when they had chosen their first character. I never played a MMORPG before and i wouldn't expect to be needed to pull later on, i just like having a pet as it seemed it would give me something more to do with the micro-management involved.. making the class more interesting. But then again i didn't chose a Warlock so something in my personality must have made me choose the Hunter.
My Warrior is more of a product of personality, i could have specced it DPS but i've chosen to be a Tank.